Help with AC Pressure Readings
Thread Starter
Registered User
Joined: Jul 1998
Posts: 12
From: Hillsboro, OR, U.S.A.
Help with AC Pressure Readings
Does someone know what engine RPM the published "A/C Performance Chart" is based on for taking refrigerant readings?
I think my AC is a bit low on refrigerant--as my air could be colder and my compressor seems to be cycling a bit much. I have a refrigerant manifold to perform a pressure test, and I found the specs for high and low pressure vs ambient temp...but in all my searches, I couldn't find what the appropriate RPMs are for the "A/C Performance Chart."
Thanks for any help...
'97 Camaro Z28
I think my AC is a bit low on refrigerant--as my air could be colder and my compressor seems to be cycling a bit much. I have a refrigerant manifold to perform a pressure test, and I found the specs for high and low pressure vs ambient temp...but in all my searches, I couldn't find what the appropriate RPMs are for the "A/C Performance Chart."
Thanks for any help...
'97 Camaro Z28
Prominent Member
Joined: Jul 2010
Posts: 1,520
From: Born on the Florida West Coast, now where can I retire?
Re: Help with AC Pressure Readings
It's at engine idle speed, but not specific. Another page says to have the engine idling for 20 minutes before starting diagnostics.
Registered User
Joined: Oct 2011
Posts: 34
From: Central Wisconsin
Re: Help with AC Pressure Readings
Yeah Marc,
I charged my 96 just last Sunday and with a 72 degree day, the pressure would be 35-45. I did also have the engine idling for about 10 minutes & kept the air on max cool. Now it seems to pumping real cold again!
I charged my 96 just last Sunday and with a 72 degree day, the pressure would be 35-45. I did also have the engine idling for about 10 minutes & kept the air on max cool. Now it seems to pumping real cold again!
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